At first I thought Cisco PVST+ and Rapid PVST+ just added an 802.1q VLAN tag, but it adds it into the extended system ID instead.
Why did they do this? Is it because 802.1q hadn't come out at that time yet?
Hi @Sam Brynes
I think this discussion gives some good explanations:
https://learningnetwork.cisco.com/thread/21718
Regards